ambassador to libya murdered in cold blood in benghazi. you have seen these pictures of protesters taking over the scene last night. this is the first american ambassador killed in the line of duty since 1979. new information we are picking up is the administration does have some suspicion, early suspicion that this was a planned attack that led to these four murders and this was not necessarily some protesters spiraling out of control. this is officials stressing the administration is not jumping to any conclusions. this is early in the investigation. they are not lowing any door or any possibility of what led to these murders. the president made clear in the rose garden that justice will be served. >> we are working with the government of libya to secure our diplomats and working to increase security at diplomatic posts around the world. make no mistake we'll work with the libyan government to bring to justice the killers who killed our people. >> reporter: he did not take questions and we could not press him on what action will be taken